1552640042 has 4 divisors (see below), whose sum is σ = 2328960066. Its totient is φ = 776320020.

The previous prime is 1552640027. The next prime is 1552640071. The reversal of 1552640042 is 2400462551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1461609361 + 91030681 = 38231^2 + 9541^2 .

It is a super-2 number, since 2×1552640042² = 4821382200043523528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1552639987 and 1552640014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388160009 + ... + 388160012.

Almost surely, 2^1552640042 is an apocalyptic number.

1552640042 is a deficient number, since it is larger than the sum of its proper divisors (776320024).

1552640042 is an equidigital number, since it uses as much as digits as its factorization.

1552640042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776320023.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1552640042 is about 39403.5536722261. The cubic root of 1552640042 is about 1157.9512096597.

The spelling of 1552640042 in words is "one billion, five hundred fifty-two million, six hundred forty thousand, forty-two".